EP 0785062 A3 19980128 - Apparatuses and methods of moulding plastics
Title (en)
Apparatuses and methods of moulding plastics
Title (de)
Vorrichtungen und Verfahrens zum Formen von Kunststoffen
Title (fr)
Dispositifs et procédés pour le moulage de matières plastiques
Publication
Application
Priority
US 58607896 A 19960116
Abstract (en)
[origin: EP0785062A2] A technique for moulding items, in particular hollow items, using resin transfer moulding, in such a manner that the resin (24) is more uniformly distributed about and along the moulding region (16) of the mould (12,14). This is accomplished by installing oppositely spaced groove (22) in the mould (12,14) and injecting resin (24) directly into these grooves (22). Upon such injection, the resin (24) travels along and fills the groove (22), by taking the path of least resistance, before such resin (24) is squeezed or forced out of a minute gap (50) between the moulding surfaces and into the moulding region (16) of the mould (12,14). As such resin (24) is being forcibly injected into the cloths (20) in the mould, a vent (42) permits any air displaced from the cloths (20) by the resin (24) to be released. Such resin injection and mould venting occurs until such time that no more air is vented and instead 100% resin (24) is being discharged from the mould (12,14). Upon this occurrence, further resin injection is curtailed and the resin (24) previously injected is allowed to harden and cure. A disposable pressure bag (18) distributes the moulding pressure created by the injected resin equally within the mould. Thus this pressure bag (18) enables a high quality void-free plastics laminate to be made. <IMAGE>
IPC 1-7
IPC 8 full level
B29C 33/10 (2006.01); B29C 33/00 (2006.01); B29C 45/34 (2006.01); B29C 70/48 (2006.01); B29C 70/54 (2006.01); B29L 22/00 (2006.01); B29L 31/00 (2006.01)
CPC (source: EP KR US)
B29C 33/0038 (2013.01 - EP US); B29C 33/0061 (2013.01 - EP US); B29C 45/00 (2013.01 - KR); B29C 70/48 (2013.01 - EP US); B29C 70/548 (2013.01 - EP US); B29L 2031/08 (2013.01 - EP US); Y10S 425/812 (2013.01 - EP US)
Citation (search report)
- [X] EP 0234341 A1 19870902 - BUDD CO [US]
- [XA] FR 2040759 A5 19710122 - SUD AVIATION
- [X] EP 0539182 A1 19930428 - MITSUBISHI CHEM IND [JP]
- [X] FR 1330854 A 19630628 - AVIATION LOUIS BREGUET SA
- [A] US 4942013 A 19900717 - PALMER RAYMOND J [US], et al
- [A] EP 0465169 A1 19920108 - HUDSON PRODUCTS CORP [US]
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0785062 A2 19970723; EP 0785062 A3 19980128; AU 681564 B1 19970828; BR 9606196 A 19980818; CA 2193328 A1 19970717; CA 2193328 C 19990824; CN 1067628 C 20010627; CN 1163185 A 19971029; JP 3222079 B2 20011022; JP H09193209 A 19970729; KR 100211352 B1 19990802; KR 970058874 A 19970812; TW 323970 B 19980101; US 5741450 A 19980421
DOCDB simple family (application)
EP 96309127 A 19961213; AU 1007097 A 19970108; BR 9606196 A 19961227; CA 2193328 A 19961218; CN 97102288 A 19970116; JP 1595697 A 19970114; KR 19970000740 A 19970114; TW 85115997 A 19961224; US 58607896 A 19960116